Add the item to be "glitterized" to your project. While clicked on the item, click on the "Format" tab. Next, click on "Surfaces". Choose the very first surface option, "Block". Slide the "Amplification" selector all the way to the right, to number 10. Click "Accept".

Repeat the above process again. In most cases, this will yield you a bling-ish enough glitter finish. If you would like more, do it again.

The alternative is to use glitter paper and fill your element with it.